Hydraulic calender



T. E. KANE HYDRAULIC CALENDER june 6, 1933.

Filed March 24, 1952 5 Sheets-Sheet l ATTOR .iune 6, 1933. T. E. KANE HYDRAULIC CALENDER June 6, 1933. T. E. KANE HYDRAULIC CALENDER 3 Shee ts-Sheet 3 7 jomasjf W221? flmm Fil'ed March 24, 1932 ATTORNEYS.

Patented June 6, 1933 UNITED STATES PATENT OFFICE THOMAS E. KANE, 01' MANSFIELD, IASSAOHUBET'IS, ASSIGNOR TO THE TEXTILE- I'INISHING MACHINERY COMPANY, A CORPORATION 01 RHODE ISLAND HYDRAULIC GALENDEB Application filed larch 24, 1982. Serial No. 600,944.

This invention relates to a hydraulic calender and has for its object to provide in a hydraulic system using a single accumulator, a means for varying the pressure on the ends of the calender rolls at either side of the calender.

Another object of this invention is the provision, in a hydraulic system using this single accumulator, of means for relieving pressure on the ends of the rolls at one side of the calender that a different pressure may be exerted on one edge portion of the material as it passes through the calender than on the other edge portion thereof.

A further object of this invention is the provision of control means at a single point for'varying the pressures applied in a hydraulic system acting on opposite sides of the machine, said control being such that the pressure had on one side of the machine is independent, within an operative range, from the pressure applied on the opposite side of the machine.

With these and other objects in view the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

big. 1 is a front view of the calender equipped with my improved construction.

Fig. 2 is a fragmeutal partially sectional view of the upper portion of the machine showing the plunger or ram for hydraulically applying the pressure and my construction for relieving the pressure so applied.-

Fig. 3 is a sectional view illustrating somewhat diagrammatically the connection from the accumulator to the hydraulic cylinders or compartments through which-pressure is applied to the piston.

Fig. 4 is a diagrammatic view illustrating the arrangement of the'conduits of the hy draulic system with indicators attached thereto and the motors and the controls for manipulating the same from a panel board. In the use of calenders or super calenders,

as sometimes called in the paper trade, me-

chanical means have been employed for applying pressure to the ends of the rolls at each side of the machine. This mechanical means has been individually operated to apply more pressure at one side than at the other side of the machine where such condi- ,tion was desired. Hydraulic means have also been used for applying pressure to the ends of the rolls at each side of the machine, which hydraulic system has been fed from and pressure applied through a single fl0 vided for varying the pressure that the ends of the rolls at one side of the machine may apply different pressure from that applied tothe ends of the rolls at the other side of the machine, and in order that this may be accomplished ina system using a single accumulator' I have provided at each side of the machine separate resilient means, such as a spring, to act against the underside of the piston or ram to relieve the pressure applied by the hydraulic system to the ends of- 7 the rol at a selected side of the machine, which spring may be controlled through a movable member operated by an electric motor and controlled from a single point by a switch to secure the desired pressure by suitably operatin a reversible motor to drive it in either direction; and the following is a detailed description of the present embodiment of this invention illustrating the preferred means by which these advantageous results may be accomplished.

With reference to the drawings, 10 designates the standards at the opposite sides of the machine between which extends the braces 11 and 12. In these standards there 9 is fixedly mounted a bottom roll 13 and upon. which there is sli'dably mounted in suitable bearings intermediate rolls 14 and a top roll 15. These rolls are suitably driven from any source of power such as by means of pulley 14 fixed to the lower roll shaft.

At the upper ends of each of these standards pressure is applied to the rolls by means of a hydraulic system. The functioning parts on each standard consist of a suitably formed pressure chamber 17 in which a piston 18 may move to a small extent to vary the volume thereof. A liquid tight packing 19 in the walls 20 slidably engages the surface of the piston 18 to form a liquid tlght seal for the liquid supplied to the chamber 17 and through which pressure is applied to the piston 18. A shaft 21 reduced as at 22 to form a shoulder 23 extends through.

the piston and is held in position by its threaded end 24 and nut 25. This shaft transmits the pressure applied to a slidable pressure block 26 recessed to provide a hydraulic chamber 27. A piston 28 is slidable in this chamber and is secured to the shaft 21 by means of a reduced portion 29 extending therethrough and forming a shoulder 30 to engage the washer 31 and held in secure engagement by the nut 32 threaded on the end 33. The piston 28 is provided with a packing 34 to slide along the walls 35 and form a liquid tight seal. This piston 28 is of equal area. to that of the top of the piston 18, thus the same pressure received at 17 would be transmitted through this shaft or ram as a whole to the pressure block 26 engaging the saddle 36 of the upper roll 15 to apply the same pressure thereto.

Withinthe framework 10 and about the shaft 21 I have fixedly mounted an internally threaded sleeve 37 in which there is a screw threaded member 38 to move along the shaft in response to rotation. This member is reduced at its upper end 39 and extends through and is splined to a worm wheel 40 by a worm 41 which is rotated by an electric motor 42. This nut 38 by its movement. varies the tension on a spring 43 which is positioned "between washers 44, engaging the nut, and washer 45, engaging the lower end of the piston 18, through which the pressure is transmitted.

Each of the hydraulic chambers 17 is connected through the branch ducts 46 and common duct 47 to the accumulator 48 upon which weights 49 rest for the application of the desired pressure to the hydraulic system which is registered at 50 in tons, frequently between fifty and one hundred tons.

When it is desired that the same amount of pressure he applied to both sides of the machine, the springs 43 will be relieved of tension. or placed under this same amount of tension, and then the accumulator will be built up or regulated by means of the weights 49 vuntil the indicator 50 registers the desired amount of pressure to be applied to the work passing through the' calender, and indicators 52 and 54 connected to chamber 29 will correspond. If it is desired to vary the amount of pressure applied to one side of the rolls, the accumulator may be built up until the pressure on the greatest side is attained and then by manipulation of the switch 51 the motor 42 may be revolved to turn the worm wheel 40 until this pressure on one side is relieved to the amount desired as indicated by the dial 52 connected to chamber 29, or if 1t so happens that the springs are under equal tension the accumulator could be built up until the desired lesser amount of pressure was indicated on the indicator 52 and then by switch 53 the motor could be operated reversely to relievethe tension on the spring, whereby the pressure could be built up until the dial 54 registered the greater amount of pressure desired to be applied to one side of the machine.

The hydraulic system with a single accu-' mulator is supplied in the usual manner when desired to fill up the system which has been emptied by means of the motor 55 which may be operated from the control board 56 by means of switch 57 in the usual .manner to pump the system full from the reservoir 0 the system. Thus, it will be observed that all parts may be controlled from a single panel board that a unit control may be had.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resortin to all the mechanical changes to which t e device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. In a hydraulic calender, a hydraulic system for applying pressure to both ends of the rolls from a single accumulator, and means in said system to vary the pressure applied to one of the ends of the rolls.

, 2. In a hydraulic 'calender,a hydraulic system for a plying pressure to both ends of the rolls rom a single accumulator, including a pair of hydraulicall pistons and means for varying t e effective pressure of one of said pistons independent of the other piston.

"3. In a hydraulic calender, a hydraulic system for applying pressure to both ends of the rolls from a s1n le accumulator, including a pair of hytIr'aulically operated pistons and mechanical means for independently and selectively var ing the effective pressure of either of sai pistons.

4. In a hydraulic calender, a hydraulic system for applying pressure to both ends of the rolls from a single accumulator, including a pair ofhydraulically operated pistons and resilient means for varying the effective pressure of one of said pistons independent of the other piston.

5. In a hydraulic calender, a hydraulic system for a plying pressure to both ends of the rolls rom a single accumulator, including a pair of hydraulically operated operatedpistons and spring means for independently and selectively varying the efiective pressure of either of said pistons.

6. In a hydraulic calender, a hydraulic system for applying pressure to both ends of the rolls from a single accumulator, and means in said system to relieve the effective pressure applied to one of the ends of the rolls to vary the pressure with reference to the pressure applied to the opposite ends of the rolls.

7 In a hydraulic calender, a hydraulic s stem for applying pressure to both ends of the rolls from a single accumulator, including a'pair of hydraulically operated pistons and means for relieving the effective pressure of one of said pistons independent of the other of said pistons.

8. In a hydraulic calender, a hydraulic system for a plying pressure to both ends of the rolls rom a single accumulator, including a pair of hydraulically operated pis-. tons and resilient means for relieving the eifective pressure of one of said pistons independent of the other of said pistons.

9. In a hydraulic calender, a hydraulic system for applying pressure to both ends of the rolls from a single accumulator, including a pair of hydraulically operated pistons and spring means for independently and selectively relieving the efiective pressure of either of said pistons.

10. In a hydraulic calender, a hydraulic means for applying pressure to the ends of plying pressure to each end bearin for the top roll including a pair of hydrau ic chambers and a piston'in each chamber, liquid in said chambers engaging said pistons, accumulator means, ducts leading from said accumulator means to each of said chambers, a spring engagin the underside of each of said pistons, an independent means for tensioning each of said springs to variably relieve pressure of said iston.

14; In a hydraulic calen er, a series of rolls, bearings for said rolls, means for applying pressure to each end bearing for the top roll including a pair of hydraulic chambers and a piston in each 0 amber, liquid in said chambers engaging said pistons, a single accumulator, ducts leading from said accumulator to each of said chambers, a spring engaging the underside of each of said pistons, and a movable nut engaging the other end of each spring to tension the same, and independent means for moving each of said nuts.

In testimony whereof I aifix my signature. -9

THOMAS E. KANE.

the rolls, including a pair of hydraulically operated pistons, spring means engaging the underside of said pistons to relieve the pressure thereof and means to independently and selectively vary the tension on said spring means.

11. In a hydraulic calender, a series of rolls, bearings for said rolls, means for applying pressure to each end bearing for the top roll including a pair of hydraulic chambers, a piston in each chamber, liquid in each chamber engaging said pistons, accumulator means, ducts leading from said accumulator to each of said chambers, means en aging the underside of each of said pistons or individually relieving the effective pressure applied t rough the liquid in said hydraulic c amber.

12. In a hydraulic calender, a series of rolls, bearings for said rolls, means for applying pressure to each end bearing for the top roll including a pair of hydraulic chambers and a piston in each chamber, liquid in said chambers engaging said pistons, accumulator means, ducts leading from said accumulator means to each of said chambers, a spring engaging the underside of each of said pistons, and means for tensioning each of said springs.

18. In a hydraulic calender, a series of rolls, bearings .for said rolls, means for ap- 

